11515151519 has 2 divisors, whose sum is σ = 11515151520. Its totient is φ = 11515151518.

The previous prime is 11515151489. The next prime is 11515151521. The reversal of 11515151519 is 91515151511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11515151519 is a prime.

It is a super-2 number, since 2×11515151519² (a number of 21 digits) contains 22 as substring.

Together with 11515151521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515156519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757575759 + 5757575760.

It is an arithmetic number, because the mean of its divisors is an integer number (5757575760).

Almost surely, 2^11515151519 is an apocalyptic number.

11515151519 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515151519 is an equidigital number, since it uses as much as digits as its factorization.

11515151519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5625, while the sum is 35.

The spelling of 11515151519 in words is "eleven billion, five hundred fifteen million, one hundred fifty-one thousand, five hundred nineteen".